serial port mystery

[Bill McCormick]

Bill McCormick said the following on 4/3/2005 10:13 PM:
> Bill McCormick said the following on 4/3/2005 6:00 PM:
> 
>> Sometime ago I upgraded to FC3 from RedHat 9 to, among other reasons,
>> get my VScom PCI 2 port serial card working.
>>
>> (RedHat 9 required a kernel re-compile)
>>
>> Anyway FC3 made it work. The two ports have been working for sometime on
>> /dev/ttyS4 & 5. Now, inexplicably (after a reboot test) the 2 ports
>> insist on using /dev/ttyS14 & 15.
>>
>> I removed my rc.serial ...
>>
>> <reference>
>> [root at billinux ~]# cat /tmp/rc.serial
>> setserial /dev/ttyS4 port 0xeca8 autoconfig
>> setserial /dev/ttyS5 port 0xec98 autoconfig
>> </reference>
>>
>> ... and still they come up as ttyS14 & 15.
>>
>> Somehow, the kernel must be doing this. But how? ACPI?  Where is the
>> config?
>> How might this have changed? yum?
>> Can I still use a rc.serial?
>> How can I get the ports permissions set to 666?
>>
>> <reference from: dmesg>
>> ACPI: PCI interrupt 0000:00:04.0[A] -> GSI 25 (level, low) -> IRQ 177
>> ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
>> ttyS14 at I/O 0xeca8 (irq = 177) is a 16550A
>> ttyS15 at I/O 0xec98 (irq = 177) is a 16550A
>> ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
>> </reference>
> 
> 
> I checked /etc/sysconfig/hwconf and found:
> 
> class: MODEM
> bus: PCI
> detached: 0
> device: ttyS4
> driver: unknown
> desc: "Titan Electronics Inc VScom 200L 1 port serial adaptor"
> vendorId: 14d2
> deviceId: 8020
> subVendorId: 14d2
> subDeviceId: 8020
> pciType: 1
> pcidom:    0
> pcibus:  0
> pcidev:  4
> pcifn:  0
> 
> I then ran $/usr/sbin/kudzu -p and it said:
> 
> class: MODEM
> bus: PCI
> detached: 0
> device: ttyS14
> driver: unknown
> desc: "Titan Electronics Inc VScom 200L 1 port serial adaptor"
> vendorId: 14d2
> deviceId: 8020
> subVendorId: 14d2
> subDeviceId: 8020
> pciType: 1
> pcidom:    0
> pcibus:  0
> pcidev:  4
> pcifn:  0
> 
> again, this device is a 2 port serial card. So now I'll reboot and see 
> what port it gets assigned ...
> 
rebooted and ttyS14 & 15 were assigned again.

output of lspci is:
[snip]
00:04.0 Serial controller: Titan Electronics Inc VScom 200L 1 port
serial adaptor
[snip]